THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4
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8
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12
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20
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Detailed explanation-1: -Answer: Four amino acids can be coded for by this message.
Detailed explanation-2: -The three-letter nature of codons means that the four nucleotides found in mRNA-A, U, G, and C-can produce a total of 64 different combinations. Of these 64 codons, 61 represent amino acids, and the remaining three represent stop signals, which trigger the end of protein synthesis.
Detailed explanation-3: -The letters are combined in groups of three to form code “words, ” called codons. Each codon stands for (encodes) one amino acid, unless it codes for a start or stop signal. There are 20 common amino acids in proteins. There are 64 possible codons, more than enough to code for the 20 amino acids.
Detailed explanation-4: -1. Three is the minimum number of nucleotides per codon needed to encode 20 amino acids. 4x4 = 16 amino acids. (i.e. 64 different combinations of four nucleotides taken three at a time).
Detailed explanation-5: -There are 64 different codons: 61 specify amino acids and 3 are used as stop signals.